Valve



No. 6l8,878. Patented Fab. 7', I899."

' A. S. HILLS.

VALVE. (Application flqd am. as, 12367.

(No Model.)

a; 1:: X I

UNITED STATES PATENT OFFICE.

ALBERT S. HILLS, OF SPRINGFIELD, MASSACHUSETTS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 618,878, dated February7, 1899.

Application filed March 3, 7- serial NO- 628,830. (No model.)

To etZZ whom it may concern.-

Be it known that I, ALBERT S. HILLS, a citizen of the United States ofAmerica, residing in Springfield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in Valves, ofwhich the following is a specification, reference being had to theaccompanying drawings and letters of reference marked thereon.

My invention relates more especially to that portion of a valve commonlycalled the disk, and which is secured to or mounted on the carrier andis moved toward and from the seat.

In the accompanying drawings like letters of reference indicate likeparts.

Figure 1 is a perspective view with a part broken away, illustrating thedetails in part of my improved construction. Fig. 2 is a side view insection, illustrating the arrangement of a restraining-ring. Fig. 3 isalike view illustrating a ring of slightly-diiferent form. Fig. 1- is alike view illustrating the ring arranged to cover the stem as well as aportion of the disk. Fig. 5 is a like view illustrating the arrangementof a strengthening-piece. Fig. 6 is a like view illustrating thearrangement of a different form of strengtheningpiece. Fig. 7 is a sideview of a plane disk and stem, illustrating the recess in the side ofthe stem. Fig. 8 isaplan viewof the same. Fig. 9 illustrates amodification in the form of the strengthening-piece and showing recessesextending from the face of the disk into the strengthening-piece. Fig.10 is an illustration of a ribbed strengthening-piece. Fig. 11 is a sideview in section, showing a strengthening-piece having bosses whichproject beyond the face of the disk. Fig. 12 is a view of the same asseen from the lower face of the disk. Fig. 13 is a view on a reducedscale, showing a portion of a valve and illustrating the manner ofemploying my device. Fig. 14 is an isometric perspective showing asingle rectangularly-shaped boss projecting beyond the face of the disk.Fig. 15 ,is an isometric perspective of a part of a stemstrengtheningpiece rectangular in cross-section, and Fig. 16 is a like view of astrengthening-piece circular in cross section and provided withanchor-openings.

In detail, aindicates the disk; I), the stem; 0, a central openingtherein; d, a channel in the side thereof; e, the stem; f, astrengthening-piece, and g a strengthening-ring.

The object of my invention is to provide a device having advantage overprior constructions.

The construction and operation are as fol lows:

The disk Ct and stem 7) are formed in one piece and made of a yieldingor semi-elastic material, preferably a compound of rubber, and the valvestem or carrier Zprovided with a recess adapted to receive the stem b,substantially as shown in Fig. 13 of the drawings. The recess in thecarrier should be of a size to receive the disk-stem when forced thereinunder slight pressure, so that the disk will not drop from the carrierif held vertically, while at the same time when the disk is seatedfirmly on the valve-seat a revolution of the carrier will not cause thedisk to revolve on the seat and thus wear and tend to destroy the faceof the disk where it contacts with the seat, but the carrier will turnupon the disk, thus allowing the disk to be moved directly toward orfrom the seat without being worn by being moved (other than toward andfrom) while in contact. A stem-provided disk of this construction, whileit will remain in position with sufficient firmness to render the valveoperative to its fullest extent, may be easily removed for the purposesof repair. As these disks are frequently subjected to great pressure inthe closing of the valve and when constructed of some materials areliable to fracture, I in some cases provide the same with astrengthening-piece, the same being preferably of metal and locatedwithin the disk, as seen at e in Fig. 1. This may be a plain piece ofmetal as formed with projections and depressions, and to strengthen thestem I may also provide it with an interior piece f. This may beemployed in connection with a strengtheningpiece in the disk or not, aspreferred. Either may, however, be used independently of the other. Iprefer that the strengthening-piece be formed with a disk and stemintegral and that the outer yielding material be molded around the same.To facilitate the removal of the device from the carrier when by reasonof corrosion or other cause itbecomes too tightly fixed thereto, I mayprovide the disk with recesses h, as shown in Fig. 9. These should bypreference enter the strengthening-plate. A spanner or suitable wrenchmay then be employed to engage in said recesses and turn the disk, thuseasily loosening it. Or as an alternative the strengthening-plate may beprovided with projections, as shown at 2', Fig. 11, extending beyond theface of yielding material, between which projections a screw-driver orother device may be placed to turn and loosen the device from thecarrier. It will of course be seen that these recesses or projectionsshould be located clearly within the area of the valveseat opening.

In some cases I prefer to provide the strengtheningdate with acentrally-located projection, as shown at i in Fig. H, which may bereadily grasped by a wrench, a pair of pliers, or other tool and thedevice loosened thereby.

I may use the stemstrengthening piece separately or with or connected tothe diskstrengthening piece, and in some instances I prefer to provideanchorage openings or projections on either or both. In Fig. Iillustratea section of a stemstrengthening piece provided with annularprojections. In Fig. 1 illustrate such piece of rectangular shape, andin Fig. 16 I illustrate the stem provided with anchorage-openings.

To avoid the undue spreading of the yielding material, I may provide thesame with a thin metal ring 1, which ring is shown in Figs. 1 and 2 ascovering the periphery of the disk and just setting over the edge at thetop,while in Fig. 3 I show the same covering the periphery of the diskand extended over the top to the stem, and in Fig. 4: I show the samecovering both stem and disk, except a portion of the periphery and lowerface of the latter.

By the employment of an encircling or restraining ring the innerstrengthening piece or pieces may be dispensed with in some instances. Iam also enabled to form the disk of a more elastic material, which willbecome seated with the application of less force, and

at the same time if greater force be employed the danger of distortionor injury is avoided.

I in some cases provide the stem with a chamber 0, which permits thestem to be compressed more easily when it is forced into a recess in thecarrier and serves in a measure, when the end of the stem abuts squarelyagainst the base of the recess in the carrier, as a vacuum-chamber toaid in retaining the stem in position. I also in some cases provide thestem with a channel (Z, preferably arranged spirally or inclined. Thisserves as a channel or outlet for the escape of air and water when thestem fits very tightly in the recess in the carrier and is forcedtherein.

lVhile these disks are intended, of course, to be used with valves, itwill be seen that as the disk is the part of a valve which mostfrequently requires renewal the disk is illtended to be manufactured andsold as an improved and independent article of manufacture.

Having therefore described my invention, what I claim, and desire tosecure by Letters Patent, is

1. A valve eomprisingan elastic disk formed with an integral elasticstem, and a strengthening-piece entirely embedded in and sur' rounded bythe elastic material.

2. A valve comprising an elastic disk formed with an integral elasticstem having a groove extending lengthwise in the face thereof, and astrengthening-piece entirely embedded in and surrounded by the elasticmaterial.

3. A valve comprising an elastic disk formed with an integral stem, astrengthening-piece entirely embedded in and surrounded by the elasticmaterial, and a circumferential metal band around the disk.

4. A valve comprisingan elastic disk formed with an integral stem astrengthening-piece embedded in the elastic material and formed withwrench-engaging means exposed at the bottom of the valve,substantiallyas described.

A LBERT S. I'IIIJIJS.

Witnesses:

ALLEN \Vnnsrnn, C. J. IIILLs.

